North Atlantic storm

41°32.9′N 030°49.1′W

Waves left about 1 Nov 03:13Z, ± 7 h

Placed by 2 buoys, whose own placements lie within 178 nmi of it

Its swell was last measured at 41044 (NE St Martin) on 6 Nov 17:20Z; the replay ends there.

Each buoy places the storm from how its swell's period shortened as it arrived: the longest waves travel fastest. Fronts are drawn at deep-water group speeds along great circles, and stop at land. How it is worked out